National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Pease Air Force Base / Portsmouth (KPSM)

Lat: 43.08°NLon: 70.82°WElev: 102ft.

Partly Cloudy

87°F

31°C

Humidity 61%
Wind Speed SE 9 mph
Barometer 30.01 in (1016.4 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 15 Jul 1:55 pm EDT
Extended Forecast for

Portsmouth NH

  • This Afternoon

    This Afternoon: Sunny, with a high near 88. Southeast wind around 5 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Widespread haze between 9am and 3pm. Sunny, with a high near 89. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 89 °F

    Haze

  • Wednesday Night

    Wednesday Night: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 71. South wind around 5 mph.

    Low: 71 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: A chance of showers between 10am and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 89. South wind around 5 mph. Chance of precipitation is 50%.

    High: 89 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 72. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 88. Southeast wind around 5 mph.
Tonight
Patchy fog after midnight. Otherwise, mostly clear, with a low around 68. Calm wind.
Wednesday
Widespread haze between 9am and 3pm. Sunny, with a high near 89. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 71. South wind around 5 mph.
Thursday
A chance of showers between 10am and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 89. South wind around 5 mph. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 61.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 81.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 63.
Monday
Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.07°N 70.78°W (Elev. 33 ft)
Last Update:
1:48 pm EDT Jul 15, 2025
Forecast Valid:
2pm EDT Jul 15, 2025-6pm EDT Jul 21, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation